This is an archive of the discontinued LLVM Phabricator instance.

[ARM] Unrestrict Armv8-a IT when at minsize
ClosedPublic

Authored by samparker on Aug 10 2020, 4:35 AM.

Download Raw Diff

Details

Reviewers

NickGuy
dmgreen
SjoerdMeijer
efriedma

Commits

rG4f9f4b21e07b: [ARM] Unrestrict Armv8-a IT when at minsize

Summary

IT blocks with more than one instruction were performance deprecated in Armv8 but that doesn't mean we should follow that advise when optimising for size.

Program                                                                                              armv8a-default armv8a-unrestrict diff
                      test-suite :: MultiSource/Benchmarks/mediabench/adpcm/rawcaudio/rawcaudio.test     796            780           -2.0%
                      test-suite :: MultiSource/Benchmarks/mediabench/adpcm/rawdaudio/rawdaudio.test     796            780           -2.0%
                                                 test-suite :: MultiSource/Applications/aha/aha.test    1996           1964           -1.6%
                                          test-suite :: MultiSource/Benchmarks/McCat/18-imp/imp.test    6940           6844           -1.4%
                            test-suite :: MultiSource/Benchmarks/Fhourstones-3.1/fhourstones3.1.test    2988           2948           -1.3%
                 test-suite :: MultiSource/Benchmarks/MiBench/automotive-susan/automotive-susan.test   14064          13900           -1.2%
                         test-suite :: MultiSource/Benchmarks/mediabench/g721/g721encode/encode.test    3852           3808           -1.1%
                                  test-suite :: SingleSource/Benchmarks/Shootout/Shootout-sieve.test     364            360           -1.1%
                           test-suite :: MultiSource/Benchmarks/FreeBench/fourinarow/fourinarow.test    4376           4328           -1.1%
                                         test-suite :: SingleSource/Benchmarks/Misc/ReedSolomon.test    2312           2288           -1.0%
                                    test-suite :: SingleSource/Benchmarks/CoyoteBench/huffbench.test    1552           1536           -1.0%
                                               test-suite :: MultiSource/Benchmarks/PAQ8p/paq8p.test   40808          40416           -1.0%
                           test-suite :: SingleSource/Benchmarks/Shootout-C++/Shootout-C++-hash.test    1788           1772           -0.9%
                                   test-suite :: MultiSource/Benchmarks/ASC_Sequoia/AMGmk/AMGmk.test    6540           6484           -0.9%
                                       test-suite :: SingleSource/Benchmarks/Misc-C++-EH/spirit.test   32624          32348           -0.8%
                                           test-suite :: MultiSource/Benchmarks/Olden/em3d/em3d.test    1932           1916           -0.8%
                                                   test-suite :: MultiSource/Benchmarks/sim/sim.test    8032           7968           -0.8%
                          test-suite :: SingleSource/Benchmarks/Shootout-C++/Shootout-C++-hash2.test    2012           1996           -0.8%
                                           test-suite :: SingleSource/Benchmarks/Misc/whetstone.test    1616           1604           -0.7%
                                    test-suite :: MultiSource/Benchmarks/Prolangs-C++/life/life.test    1084           1076           -0.7%
                                             test-suite :: SingleSource/Benchmarks/McGill/chomp.test    1672           1660           -0.7%
                                       test-suite :: MultiSource/Benchmarks/Olden/bisort/bisort.test    1120           1112           -0.7%
                      test-suite :: SingleSource/Benchmarks/Shootout-C++/EH/Shootout-C++-except.test     568            564           -0.7%
                         test-suite :: MultiSource/Benchmarks/MiBench/security-sha/security-sha.test    1180           1172           -0.7%
                        test-suite :: MultiSource/Benchmarks/Trimaran/netbench-url/netbench-url.test    1808           1796           -0.7%
                                         test-suite :: MultiSource/Applications/SIBsim4/SIBsim4.test   18892          18768           -0.7%
                                     test-suite :: MultiSource/Benchmarks/FreeBench/mason/mason.test    1232           1224           -0.6%
                         test-suite :: SingleSource/Benchmarks/Shootout-C++/Shootout-C++-lists1.test    1248           1240           -0.6%
                                       test-suite :: MultiSource/Applications/hexxagon/hexxagon.test    7296           7252           -0.6%
                                test-suite :: MultiSource/Benchmarks/BitBench/uudecode/uudecode.test     664            660           -0.6%
                                test-suite :: SingleSource/Benchmarks/BenchmarkGame/Large/fasta.test     668            664           -0.6%
                                   test-suite :: MultiSource/Benchmarks/FreeBench/neural/neural.test    2684           2668           -0.6%
                                             test-suite :: MultiSource/Applications/sgefa/sgefa.test    5404           5372           -0.6%
                                           test-suite :: SingleSource/Benchmarks/Stanford/Oscar.test    1352           1344           -0.6%
                                    test-suite :: MultiSource/Benchmarks/VersaBench/8b10b/8b10b.test     692            688           -0.6%
                                test-suite :: MultiSource/Benchmarks/Prolangs-C++/employ/employ.test    2092           2104            0.6%
                           test-suite :: MultiSource/Benchmarks/FreeBench/pcompress2/pcompress2.test    2828           2812           -0.6%
                                        test-suite :: MultiSource/Applications/JM/ldecod/ldecod.test  127424         126708           -0.6%
                                         test-suite :: MultiSource/Applications/minisat/minisat.test   10044           9988           -0.6%
                                             test-suite :: MultiSource/Benchmarks/Ptrdist/bc/bc.test   19544          19436           -0.6%
                                             test-suite :: MultiSource/Applications/spiff/spiff.test   10904          10844           -0.6%
                                    test-suite :: MultiSource/Benchmarks/Prolangs-C/agrep/agrep.test   22588          22468           -0.5%
                                          test-suite :: MultiSource/Benchmarks/NPB-serial/is/is.test    1508           1500           -0.5%
                                         test-suite :: MultiSource/Applications/ClamAV/clamscan.test  246368         245132           -0.5%
                                     test-suite :: MultiSource/Applications/lambda-0.1.3/lambda.test   13244          13180           -0.5%
                           test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C++/miniFE/miniFE.test   29248          29108           -0.5%
                                test-suite :: MultiSource/Benchmarks/mediabench/gsm/toast/toast.test   15136          15072           -0.4%
                         test-suite :: MultiSource/Benchmarks/MiBench/telecomm-gsm/telecomm-gsm.test   15136          15072           -0.4%
                       test-suite :: MultiSource/Benchmarks/MiBench/consumer-lame/consumer-lame.test   68228          67940           -0.4%
                                           test-suite :: MultiSource/Applications/oggenc/oggenc.test   88308          87940           -0.4%
                                  test-suite :: SingleSource/Benchmarks/Shootout/Shootout-lists.test     960            956           -0.4%
                                             test-suite :: MultiSource/Applications/SPASS/SPASS.test  200896         200064           -0.4%
                                            test-suite :: SingleSource/Benchmarks/McGill/queens.test     980            976           -0.4%
                                    test-suite :: MultiSource/Benchmarks/Prolangs-C/gnugo/gnugo.test    7856           7824           -0.4%
                        test-suite :: SingleSource/Benchmarks/Shootout-C++/Shootout-C++-moments.test    1980           1972           -0.4%
                                          test-suite :: MultiSource/Benchmarks/McCat/09-vor/vor.test    5136           5116           -0.4%
                           test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/miniAMR/miniAMR.test   30872          30752           -0.4%
                                                 test-suite :: MultiSource/Applications/lua/lua.test   60312          60080           -0.4%
                             test-suite :: MultiSource/Benchmarks/MallocBench/espresso/espresso.test   67796          67536           -0.4%
                                         test-suite :: MultiSource/Applications/sqlite3/sqlite3.test  167448         166808           -0.4%
                                   test-suite :: MultiSource/Benchmarks/Fhourstones/fhourstones.test    4212           4196           -0.4%
                                       test-suite :: MultiSource/Benchmarks/SciMark2-C/scimark2.test    4228           4212           -0.4%
                                  test-suite :: MultiSource/Benchmarks/Prolangs-C++/ocean/ocean.test    2176           2168           -0.4%
                                      test-suite :: MultiSource/Benchmarks/mafft/pairlocalalign.test  167628         167012           -0.4%
                                  test-suite :: MultiSource/Benchmarks/Trimaran/enc-pc1/enc-pc1.test    1092           1088           -0.4%
                 test-suite :: MultiSource/Benchmarks/MiBench/network-patricia/network-patricia.test    1096           1092           -0.4%
                                    test-suite :: SingleSource/Benchmarks/CoyoteBench/almabench.test    2232           2224           -0.4%
                                     test-suite :: SingleSource/Benchmarks/Misc-C++/oopack_v1p8.test    2256           2248           -0.4%
                                        test-suite :: MultiSource/Applications/JM/lencod/lencod.test  317712         316600           -0.4%
           test-suite :: MultiSource/Benchmarks/MiBench/automotive-bitcount/automotive-bitcount.test    1176           1172           -0.3%
                         test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C++/PENNANT/PENNANT.test   32428          32320           -0.3%
                     test-suite :: MultiSource/Benchmarks/mediabench/mpeg2/mpeg2dec/mpeg2decode.test   22352          22280           -0.3%
                                     test-suite :: SingleSource/Benchmarks/CoyoteBench/fftbench.test    2532           2524           -0.3%
                              test-suite :: SingleSource/Benchmarks/Misc-C++/stepanov_container.test    9036           9008           -0.3%
                                  test-suite :: MultiSource/Benchmarks/Prolangs-C/bison/mybison.test   26288          26208           -0.3%
                               test-suite :: MultiSource/Benchmarks/FreeBench/analyzer/analyzer.test    3980           3968           -0.3%
                                      test-suite :: SingleSource/Benchmarks/CoyoteBench/lpbench.test    1376           1372           -0.3%
                                             test-suite :: MultiSource/Benchmarks/Olden/mst/mst.test    1428           1424           -0.3%
                                  test-suite :: SingleSource/Benchmarks/Misc/richards_benchmark.test    1432           1428           -0.3%
                                   test-suite :: MultiSource/Benchmarks/MallocBench/cfrac/cfrac.test   11624          11592           -0.3%
                                       test-suite :: MultiSource/Benchmarks/Ptrdist/yacr2/yacr2.test   10632          10604           -0.3%
                                          test-suite :: MultiSource/Applications/d/make_dparser.test   42548          42440           -0.3%
                                     test-suite :: MultiSource/Benchmarks/FreeBench/pifft/pifft.test   23684          23624           -0.3%
                                       test-suite :: MultiSource/Benchmarks/7zip/7zip-benchmark.test  324948         324144           -0.2%
                                         test-suite :: MultiSource/Benchmarks/MallocBench/gs/gs.test   76676          76488           -0.2%
                                         test-suite :: MultiSource/Applications/obsequi/Obsequi.test   16536          16496           -0.2%
                                               test-suite :: MultiSource/Applications/siod/siod.test   45844          45740           -0.2%
                                test-suite :: SingleSource/Benchmarks/Adobe-C++/functionobjects.test    7512           7496           -0.2%
                             test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/CLAMR.test  218172         217708           -0.2%
                       test-suite :: MultiSource/Benchmarks/MiBench/consumer-jpeg/consumer-jpeg.test   58564          58440           -0.2%
                                   test-suite :: MultiSource/Benchmarks/Ptrdist/anagram/anagram.test    1940           1944            0.2%
                                             test-suite :: MultiSource/Benchmarks/Olden/tsp/tsp.test    1944           1940           -0.2%
                                            test-suite :: MultiSource/Applications/kimwitu++/kc.test  243004         242516           -0.2%
                                      test-suite :: MultiSource/Benchmarks/VersaBench/dbms/dbms.test    8252           8236           -0.2%
                           test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/RSBench/rsbench.test    8304           8288           -0.2%
                                  test-suite :: MicroBenchmarks/LCALS/SubsetCRawLoops/lcalsCRaw.test   91684          91508           -0.2%
                            test-suite :: MicroBenchmarks/LCALS/SubsetBLambdaLoops/lcalsBLambda.test   86884          86740           -0.2%
                                  test-suite :: MicroBenchmarks/LoopInterchange/LoopInterchange.test   59976          59880           -0.2%
                                    test-suite :: MicroBenchmarks/ImageProcessing/Dilate/Dilate.test   61224          61128           -0.2%
        test-suite :: MicroBenchmarks/ImageProcessing/AnisotropicDiffusion/AnisotropicDiffusion.test   61528          61432           -0.2%
                      test-suite :: MultiSource/Benchmarks/TSVC/ControlFlow-dbl/ControlFlow-dbl.test   12888          12868           -0.2%
                                        test-suite :: MicroBenchmarks/ImageProcessing/Blur/blur.test   61864          61768           -0.2%
                      test-suite :: MicroBenchmarks/ImageProcessing/Interpolation/Interpolation.test   61960          61864           -0.2%
                                    test-suite :: MicroBenchmarks/ImageProcessing/Dither/Dither.test   62088          61992           -0.2%
                                                    test-suite :: MicroBenchmarks/harris/harris.test   62280          62184           -0.2%
                             test-suite :: MultiSource/Benchmarks/mediabench/jpeg/jpeg-6a/cjpeg.test   60464          60372           -0.2%
                                test-suite :: SingleSource/Benchmarks/Adobe-C++/stepanov_vector.test    7996           7984           -0.2%
                           test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/XSBench/XSBench.test    5388           5380           -0.1%
                                             test-suite :: MultiSource/Benchmarks/Ptrdist/ks/ks.test    2764           2760           -0.1%
                                               test-suite :: MultiSource/Benchmarks/Olden/bh/bh.test    6180           6172           -0.1%
                                  test-suite :: MicroBenchmarks/LCALS/SubsetARawLoops/lcalsARaw.test   89668          89556           -0.1%
                            test-suite :: MicroBenchmarks/LCALS/SubsetALambdaLoops/lcalsALambda.test   90452          90340           -0.1%
                       test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/SimpleMOC/SimpleMOC.test   13308          13292           -0.1%
                     test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/Pathfinder/PathFinder.test   10600          10612            0.1%
                               test-suite :: MultiSource/Benchmarks/ASCI_Purple/SMG2000/smg2000.test   88952          88860           -0.1%
                          test-suite :: MultiSource/Applications/ALAC/decode/alacconvert-decode.test   19932          19912           -0.1%
                          test-suite :: MultiSource/Applications/ALAC/encode/alacconvert-encode.test   19932          19912           -0.1%
                                test-suite :: MultiSource/Benchmarks/Trimaran/enc-3des/enc-3des.test    8104           8096           -0.1%
                                     test-suite :: MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4.test  198820         198628           -0.1%
                                    test-suite :: MultiSource/Benchmarks/Prolangs-C++/city/city.test    4216           4212           -0.1%
                                             test-suite :: MultiSource/Benchmarks/Bullet/bullet.test  296292         296012           -0.1%
                      test-suite :: MultiSource/Benchmarks/TSVC/ControlFlow-flt/ControlFlow-flt.test   13372          13360           -0.1%
                                 test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/CoMD/CoMD.test   18684          18668           -0.1%
                                             test-suite :: MultiSource/Benchmarks/nbench/nbench.test   15516          15504           -0.1%
                           test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/miniGMG/miniGMG.test   25336          25320           -0.1%
                             test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C++/HPCCG/HPCCG.test    7132           7128           -0.1%
               test-suite :: MultiSource/Benchmarks/MiBench/security-rijndael/security-rijndael.test    7800           7796           -0.1%

Geomean difference                                  -0.2%

Diff Detail

Event Timeline

samparker created this revision.Aug 10 2020, 4:35 AM

Herald added a project: Restricted Project. · View Herald TranscriptAug 10 2020, 4:35 AM

Herald added subscribers: danielkiss, hiraditya, kristof.beyls. · View Herald Transcript

samparker requested review of this revision.Aug 10 2020, 4:35 AM

samparker edited the summary of this revision. (Show Details)

Harbormaster completed remote builds in B67694: Diff 284311.Aug 10 2020, 5:04 AM

Source changes look good to me, just a few test-related points to address.

llvm/test/CodeGen/ARM/codesize-ifcvt.mir
2	Nit: Shouldn't this be CHECK-V7? I haven't seen any tests that don't follow that convention.
2–3	Could we also have a test for V8 with -Oz? Given that that is what this change effects most
223–251	Is any of this needed now? It looks identical to the V7 block.

samparker added inline comments.Aug 10 2020, 5:21 AM

llvm/test/CodeGen/ARM/codesize-ifcvt.mir
2	fair enough.
2–3	-Oz is a clang frontend option so we can't use it for testing with llc. With LLVM IR, we attach attributes on the functions for optsize (Os) and minsize (Oz): attributes #0 = { optsize } attributes #1 = { minsize }
223–251	Ah! cheers.

Amended test.

LGTM, if no one else has any issues.

llvm/test/CodeGen/ARM/codesize-ifcvt.mir
2	Thanks
2–3	Ah, I'd missed that part. Ignore me here :)
223–251	👍

This revision is now accepted and ready to land.Aug 10 2020, 5:51 AM

Closed by commit rG4f9f4b21e07b: [ARM] Unrestrict Armv8-a IT when at minsize (authored by samparker). · Explain WhyAug 10 2020, 7:00 AM

This revision was automatically updated to reflect the committed changes.

samparker added a commit: rG4f9f4b21e07b: [ARM] Unrestrict Armv8-a IT when at minsize.

Revision Contents

Path

Size

llvm/

lib/

Target/

ARM/

ARMBaseInstrInfo.cpp

7 lines

ARMSubtarget.cpp

2 lines

test/

CodeGen/

ARM/

codesize-ifcvt.mir

216 lines

ifcvt-size.mir

4 lines

Diff 284311

llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp

	Show First 20 Lines • Show All 992 Lines • ▼ Show 20 Lines
	}			}

	unsigned			unsigned
	ARMBaseInstrInfo::extraSizeToPredicateInstructions(const MachineFunction &MF,			ARMBaseInstrInfo::extraSizeToPredicateInstructions(const MachineFunction &MF,
	unsigned NumInsts) const {			unsigned NumInsts) const {
	// Thumb2 needs a 2-byte IT instruction to predicate up to 4 instructions.			// Thumb2 needs a 2-byte IT instruction to predicate up to 4 instructions.
	// ARM has a condition code field in every predicable instruction, using it			// ARM has a condition code field in every predicable instruction, using it
	// doesn't change code size.			// doesn't change code size.
	return Subtarget.isThumb2() ? divideCeil(NumInsts, 4) * 2 : 0;			if (!Subtarget.isThumb2())
				return 0;

				// It's possible that the size of the IT is restricted to a single block.
				unsigned MaxInsts = Subtarget.restrictIT() ? 1 : 4;
				return divideCeil(NumInsts, MaxInsts) * 2;
	}			}

	unsigned			unsigned
	ARMBaseInstrInfo::predictBranchSizeForIfCvt(MachineInstr &MI) const {			ARMBaseInstrInfo::predictBranchSizeForIfCvt(MachineInstr &MI) const {
	// If this branch is likely to be folded into the comparison to form a			// If this branch is likely to be folded into the comparison to form a
	// CB(N)Z, then removing it won't reduce code size at all, because that will			// CB(N)Z, then removing it won't reduce code size at all, because that will
	// just replace the CB(N)Z with a CMP.			// just replace the CB(N)Z with a CMP.
	if (MI.getOpcode() == ARM::t2Bcc &&			if (MI.getOpcode() == ARM::t2Bcc &&
	▲ Show 20 Lines • Show All 992 Lines • Show Last 20 Lines

llvm/lib/Target/ARM/ARMSubtarget.cpp

Show First 20 Lines • Show All 231 Lines • ▼ Show 20 Lines	void ARMSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {

SupportsTailCall = !isThumb() \|\| hasV8MBaselineOps();		SupportsTailCall = !isThumb() \|\| hasV8MBaselineOps();

if (isTargetMachO() && isTargetIOS() && getTargetTriple().isOSVersionLT(5, 0))		if (isTargetMachO() && isTargetIOS() && getTargetTriple().isOSVersionLT(5, 0))
SupportsTailCall = false;		SupportsTailCall = false;

switch (IT) {		switch (IT) {
case DefaultIT:		case DefaultIT:
RestrictIT = hasV8Ops();		RestrictIT = hasV8Ops() && !hasMinSize();
break;		break;
case RestrictedIT:		case RestrictedIT:
RestrictIT = true;		RestrictIT = true;
break;		break;
case NoRestrictedIT:		case NoRestrictedIT:
RestrictIT = false;		RestrictIT = false;
break;		break;
}		}
▲ Show 20 Lines • Show All 233 Lines • Show Last 20 Lines

llvm/test/CodeGen/ARM/codesize-ifcvt.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py		# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=thumbv7 -run-pass=if-converter %s -o - \| FileCheck %s		# RUN: llc -mtriple=thumbv7 -run-pass=if-converter %s -o - \| FileCheck %s --check-prefix=V7
		NickGuyUnsubmitted Not Done Reply Inline Actions Nit: Shouldn't this be CHECK-V7? I haven't seen any tests that don't follow that convention. NickGuy: Nit: Shouldn't this be CHECK-V7? I haven't seen any tests that don't follow that convention.
		samparkerAuthorUnsubmitted Done Reply Inline Actions fair enough. samparker: fair enough.
		NickGuyUnsubmitted Done Reply Inline Actions Thanks NickGuy: Thanks
		# RUN: llc -mtriple=thumbv8 -run-pass=if-converter %s -o - \| FileCheck %s --check-prefix=V8
		NickGuyUnsubmitted Not Done Reply Inline Actions Could we also have a test for V8 with -Oz? Given that that is what this change effects most NickGuy: Could we also have a test for V8 with -Oz? Given that that is what this change effects most
		samparkerAuthorUnsubmitted Done Reply Inline Actions -Oz is a clang frontend option so we can't use it for testing with llc. With LLVM IR, we attach attributes on the functions for optsize (Os) and minsize (Oz): attributes #0 = { optsize } attributes #1 = { minsize } samparker: -Oz is a clang frontend option so we can't use it for testing with llc. With LLVM IR, we attach…
		NickGuyUnsubmitted Done Reply Inline Actions Ah, I'd missed that part. Ignore me here :) NickGuy: Ah, I'd missed that part. Ignore me here :)
--- \|		--- \|
define void @test_nosize() {		define void @test_nosize() {
%c0 = icmp sgt i64 0, 0		%c0 = icmp sgt i64 0, 0
br i1 %c0, label %b1, label %b6		br i1 %c0, label %b1, label %b6

b1: ; preds = %0		b1: ; preds = %0
br i1 undef, label %b3, label %b2		br i1 undef, label %b3, label %b2

▲ Show 20 Lines • Show All 139 Lines • ▼ Show 20 Lines	- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }		debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,		- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,		stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }		debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []		callSites: []
constants: []		constants: []
machineFunctionInfo: {}		machineFunctionInfo: {}
body: \|		body: \|
		; V7-LABEL: name: test_nosize
		; V7: bb.0 (%ir-block.0):
		; V7: successors: %bb.2(0x40000000), %bb.1(0x40000000)
		; V7: liveins: $lr, $r7
		; V7: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: tTAILJMPdND @extfunc, 1 /* CC::ne */, killed $cpsr, implicit $sp, implicit $sp
		; V7: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr
		; V7: frame-setup CFI_INSTRUCTION def_cfa_offset 8
		; V7: frame-setup CFI_INSTRUCTION offset $lr, -4
		; V7: frame-setup CFI_INSTRUCTION offset $r7, -8
		; V7: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: t2Bcc %bb.2, 1 /* CC::ne */, killed $cpsr
		; V7: bb.1.b2:
		; V7: successors: %bb.3(0x80000000)
		; V7: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
		; V7: t2B %bb.3, 14 /* CC::al */, $noreg
		; V7: bb.2.b3:
		; V7: successors: %bb.3(0x80000000)
		; V7: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)
		; V7: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg
		; V7: bb.3.b5:
		; V7: liveins: $r0
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr
		; V7: tBX_RET 0 /* CC::eq */, killed $cpsr
		; V7: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp
		; V8-LABEL: name: test_nosize
		; V8: bb.0 (%ir-block.0):
		; V8: successors: %bb.1(0x50000000), %bb.6(0x30000000)
		; V8: liveins: $lr, $r7
		; V8: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V8: bb.1.b1:
		; V8: successors: %bb.3(0x40000000), %bb.2(0x40000000)
		; V8: liveins: $r7, $lr
		; V8: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr
		; V8: frame-setup CFI_INSTRUCTION def_cfa_offset 8
		; V8: frame-setup CFI_INSTRUCTION offset $lr, -4
		; V8: frame-setup CFI_INSTRUCTION offset $r7, -8
		; V8: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: t2Bcc %bb.3, 1 /* CC::ne */, killed $cpsr
		; V8: bb.2.b2:
		; V8: successors: %bb.4(0x80000000)
		; V8: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
		; V8: t2B %bb.4, 14 /* CC::al */, $noreg
		; V8: bb.3.b3:
		; V8: successors: %bb.4(0x80000000)
		; V8: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)
		; V8: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg
		; V8: bb.4.b5:
		; V8: successors: %bb.5(0x30000000), %bb.6(0x50000000)
		; V8: liveins: $r0
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr
		; V8: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V8: bb.5.b8:
		; V8: liveins: $lr, $r7
		; V8: tBX_RET 14 /* CC::al */, $noreg
		; V8: bb.6.b7:
		; V8: liveins: $lr, $r7
		; V8: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp
; CHECK-LABEL: name: test_nosize		; CHECK-LABEL: name: test_nosize
; CHECK: bb.0 (%ir-block.0):		; CHECK: bb.0 (%ir-block.0):
; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)		; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
; CHECK: liveins: $lr, $r7		; CHECK: liveins: $lr, $r7
; CHECK: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg		; CHECK: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr		; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: tTAILJMPdND @extfunc, 1 /* CC::ne */, killed $cpsr, implicit $sp, implicit $sp		; CHECK: tTAILJMPdND @extfunc, 1 /* CC::ne */, killed $cpsr, implicit $sp, implicit $sp
; CHECK: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr		; CHECK: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr
; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 8		; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 8
; CHECK: frame-setup CFI_INSTRUCTION offset $lr, -4		; CHECK: frame-setup CFI_INSTRUCTION offset $lr, -4
; CHECK: frame-setup CFI_INSTRUCTION offset $r7, -8		; CHECK: frame-setup CFI_INSTRUCTION offset $r7, -8
; CHECK: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg		; CHECK: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr		; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2Bcc %bb.2, 1 /* CC::ne */, killed $cpsr		; CHECK: t2Bcc %bb.2, 1 /* CC::ne */, killed $cpsr
; CHECK: bb.1.b2:		; CHECK: bb.1.b2:
; CHECK: successors: %bb.3(0x80000000)		; CHECK: successors: %bb.3(0x80000000)
; CHECK: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0		; CHECK: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg		; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg
; CHECK: bb.2.b3:		; CHECK: bb.2.b3:
; CHECK: successors: %bb.3(0x80000000)		; CHECK: successors: %bb.3(0x80000000)
; CHECK: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)		; CHECK: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)
; CHECK: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg		; CHECK: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg
; CHECK: bb.3.b5:		; CHECK: bb.3.b5:
; CHECK: liveins: $r0		; CHECK: liveins: $r0
; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr		; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr		; CHECK: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr
; CHECK: tBX_RET 0 /* CC::eq */, killed $cpsr		; CHECK: tBX_RET 0 /* CC::eq */, killed $cpsr
; CHECK: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp		; CHECK: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp
		NickGuyUnsubmitted Not Done Reply Inline Actions Is any of this needed now? It looks identical to the V7 block. NickGuy: Is any of this needed now? It looks identical to the V7 block.
		samparkerAuthorUnsubmitted Done Reply Inline Actions Ah! cheers. samparker: Ah! cheers.
		NickGuyUnsubmitted Done Reply Inline Actions 👍 NickGuy: 👍
bb.0 (%ir-block.0):		bb.0 (%ir-block.0):
successors: %bb.1(0x50000000), %bb.6(0x30000000)		successors: %bb.1(0x50000000), %bb.6(0x30000000)
liveins: $lr, $r7		liveins: $lr, $r7

renamable $r0 = t2MOVi 1, 14, $noreg, $noreg		renamable $r0 = t2MOVi 1, 14, $noreg, $noreg
t2CMPri killed renamable $r0, 0, 14, $noreg, implicit-def $cpsr		t2CMPri killed renamable $r0, 0, 14, $noreg, implicit-def $cpsr
t2Bcc %bb.6, 1, killed $cpsr		t2Bcc %bb.6, 1, killed $cpsr

▲ Show 20 Lines • Show All 78 Lines • ▼ Show 20 Lines	- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }		debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,		- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,		stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }		debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []		callSites: []
constants: []		constants: []
machineFunctionInfo: {}		machineFunctionInfo: {}
body: \|		body: \|
		; V7-LABEL: name: test_optsize
		; V7: bb.0 (%ir-block.0):
		; V7: successors: %bb.1(0x50000000), %bb.6(0x30000000)
		; V7: liveins: $lr, $r7
		; V7: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V7: bb.1.b1:
		; V7: successors: %bb.3(0x40000000), %bb.2(0x40000000)
		; V7: liveins: $r7, $lr
		; V7: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr
		; V7: frame-setup CFI_INSTRUCTION def_cfa_offset 8
		; V7: frame-setup CFI_INSTRUCTION offset $lr, -4
		; V7: frame-setup CFI_INSTRUCTION offset $r7, -8
		; V7: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: t2Bcc %bb.3, 1 /* CC::ne */, killed $cpsr
		; V7: bb.2.b2:
		; V7: successors: %bb.4(0x80000000)
		; V7: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
		; V7: t2B %bb.4, 14 /* CC::al */, $noreg
		; V7: bb.3.b3:
		; V7: successors: %bb.4(0x80000000)
		; V7: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)
		; V7: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg
		; V7: bb.4.b5:
		; V7: successors: %bb.5(0x30000000), %bb.6(0x50000000)
		; V7: liveins: $r0
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr
		; V7: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V7: bb.5.b8:
		; V7: liveins: $lr, $r7
		; V7: tBX_RET 14 /* CC::al */, $noreg
		; V7: bb.6.b7:
		; V7: liveins: $lr, $r7
		; V7: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp
		; V8-LABEL: name: test_optsize
		; V8: bb.0 (%ir-block.0):
		; V8: successors: %bb.1(0x50000000), %bb.6(0x30000000)
		; V8: liveins: $lr, $r7
		; V8: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V8: bb.1.b1:
		; V8: successors: %bb.3(0x40000000), %bb.2(0x40000000)
		; V8: liveins: $r7, $lr
		; V8: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr
		; V8: frame-setup CFI_INSTRUCTION def_cfa_offset 8
		; V8: frame-setup CFI_INSTRUCTION offset $lr, -4
		; V8: frame-setup CFI_INSTRUCTION offset $r7, -8
		; V8: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: t2Bcc %bb.3, 1 /* CC::ne */, killed $cpsr
		; V8: bb.2.b2:
		; V8: successors: %bb.4(0x80000000)
		; V8: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
		; V8: t2B %bb.4, 14 /* CC::al */, $noreg
		; V8: bb.3.b3:
		; V8: successors: %bb.4(0x80000000)
		; V8: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)
		; V8: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg
		; V8: bb.4.b5:
		; V8: successors: %bb.5(0x30000000), %bb.6(0x50000000)
		; V8: liveins: $r0
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr
		; V8: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V8: bb.5.b8:
		; V8: liveins: $lr, $r7
		; V8: tBX_RET 14 /* CC::al */, $noreg
		; V8: bb.6.b7:
		; V8: liveins: $lr, $r7
		; V8: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp
; CHECK-LABEL: name: test_optsize		; CHECK-LABEL: name: test_optsize
; CHECK: bb.0 (%ir-block.0):		; CHECK: bb.0 (%ir-block.0):
; CHECK: successors: %bb.1(0x50000000), %bb.6(0x30000000)		; CHECK: successors: %bb.1(0x50000000), %bb.6(0x30000000)
; CHECK: liveins: $lr, $r7		; CHECK: liveins: $lr, $r7
; CHECK: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg		; CHECK: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr		; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr		; CHECK: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
; CHECK: bb.1.b1:		; CHECK: bb.1.b1:
▲ Show 20 Lines • Show All 115 Lines • ▼ Show 20 Lines	- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }		debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,		- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,		stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }		debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []		callSites: []
constants: []		constants: []
machineFunctionInfo: {}		machineFunctionInfo: {}
body: \|		body: \|
		; V7-LABEL: name: test_minsize
		; V7: bb.0 (%ir-block.0):
		; V7: successors: %bb.1(0x50000000), %bb.6(0x30000000)
		; V7: liveins: $lr, $r7
		; V7: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V7: bb.1.b1:
		; V7: successors: %bb.3(0x40000000), %bb.2(0x40000000)
		; V7: liveins: $r7, $lr
		; V7: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr
		; V7: frame-setup CFI_INSTRUCTION def_cfa_offset 8
		; V7: frame-setup CFI_INSTRUCTION offset $lr, -4
		; V7: frame-setup CFI_INSTRUCTION offset $r7, -8
		; V7: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: t2Bcc %bb.3, 1 /* CC::ne */, killed $cpsr
		; V7: bb.2.b2:
		; V7: successors: %bb.4(0x80000000)
		; V7: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
		; V7: t2B %bb.4, 14 /* CC::al */, $noreg
		; V7: bb.3.b3:
		; V7: successors: %bb.4(0x80000000)
		; V7: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)
		; V7: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg
		; V7: bb.4.b5:
		; V7: successors: %bb.5(0x30000000), %bb.6(0x50000000)
		; V7: liveins: $r0
		; V7: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V7: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr
		; V7: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V7: bb.5.b8:
		; V7: liveins: $lr, $r7
		; V7: tBX_RET 14 /* CC::al */, $noreg
		; V7: bb.6.b7:
		; V7: liveins: $lr, $r7
		; V7: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp
		; V8-LABEL: name: test_minsize
		; V8: bb.0 (%ir-block.0):
		; V8: successors: %bb.1(0x50000000), %bb.6(0x30000000)
		; V8: liveins: $lr, $r7
		; V8: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V8: bb.1.b1:
		; V8: successors: %bb.3(0x40000000), %bb.2(0x40000000)
		; V8: liveins: $r7, $lr
		; V8: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r7, killed $lr
		; V8: frame-setup CFI_INSTRUCTION def_cfa_offset 8
		; V8: frame-setup CFI_INSTRUCTION offset $lr, -4
		; V8: frame-setup CFI_INSTRUCTION offset $r7, -8
		; V8: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: t2Bcc %bb.3, 1 /* CC::ne */, killed $cpsr
		; V8: bb.2.b2:
		; V8: successors: %bb.4(0x80000000)
		; V8: tBL 14 /* CC::al */, $noreg, @extfunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
		; V8: t2B %bb.4, 14 /* CC::al */, $noreg
		; V8: bb.3.b3:
		; V8: successors: %bb.4(0x80000000)
		; V8: renamable $r0 = t2LDRi12 undef renamable $r0, 0, 14 /* CC::al /, $noreg :: (load 4 from `i32 undef`)
		; V8: renamable $r0 = t2ANDri killed renamable $r0, 256, 14 /* CC::al */, $noreg, $noreg
		; V8: bb.4.b5:
		; V8: successors: %bb.5(0x30000000), %bb.6(0x50000000)
		; V8: liveins: $r0
		; V8: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
		; V8: $sp = t2LDMIA_UPD $sp, 14 /* CC::al */, $noreg, def $r7, def $lr
		; V8: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
		; V8: bb.5.b8:
		; V8: liveins: $lr, $r7
		; V8: tBX_RET 14 /* CC::al */, $noreg
		; V8: bb.6.b7:
		; V8: liveins: $lr, $r7
		; V8: tTAILJMPdND @extfunc, 14 /* CC::al */, $noreg, implicit $sp, implicit $sp
; CHECK-LABEL: name: test_minsize		; CHECK-LABEL: name: test_minsize
; CHECK: bb.0 (%ir-block.0):		; CHECK: bb.0 (%ir-block.0):
; CHECK: successors: %bb.1(0x50000000), %bb.6(0x30000000)		; CHECK: successors: %bb.1(0x50000000), %bb.6(0x30000000)
; CHECK: liveins: $lr, $r7		; CHECK: liveins: $lr, $r7
; CHECK: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg		; CHECK: renamable $r0 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr		; CHECK: t2CMPri killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr		; CHECK: t2Bcc %bb.6, 1 /* CC::ne */, killed $cpsr
; CHECK: bb.1.b1:		; CHECK: bb.1.b1:
▲ Show 20 Lines • Show All 80 Lines • Show Last 20 Lines

llvm/test/CodeGen/ARM/ifcvt-size.mir

	# RUN: llc %s -o - -run-pass=if-converter -debug-only=if-converter 2>%t\| FileCheck %s			# RUN: llc -mtriple=thumbv8a-unknown-linux-gnueabi %s -o - -run-pass=if-converter -debug-only=if-converter \| FileCheck %s
				# RUN: llc -mtriple=thumbv7-unknown-linux-gnueabi %s -o - -run-pass=if-converter -debug-only=if-converter 2>%t\| FileCheck %s
	# RUN: FileCheck %s < %t --check-prefix=DEBUG			# RUN: FileCheck %s < %t --check-prefix=DEBUG
	# REQUIRES: asserts			# REQUIRES: asserts

	# When optimising for size, we use a different set of heuristics for			# When optimising for size, we use a different set of heuristics for
	# if-conversion, which take into account the size of the instructions, not the			# if-conversion, which take into account the size of the instructions, not the
	# time taken to execute them. This is more complicated for Thumb, where it if			# time taken to execute them. This is more complicated for Thumb, where it if
	# also affected by selection of narrow branch instructions, insertion if IT			# also affected by selection of narrow branch instructions, insertion if IT
	# instructions, and selection of the CB(N)Z instructions.			# instructions, and selection of the CB(N)Z instructions.

	--- \|			--- \|
	target triple = "thumbv7-unknown-linux-gnueabi"

	define void @fn1() minsize {			define void @fn1() minsize {
	entry:			entry:
	unreachable			unreachable
	if.then:			if.then:
	unreachable			unreachable
	if.else:			if.else:
	unreachable			unreachable
	▲ Show 20 Lines • Show All 541 Lines • Show Last 20 Lines